Tire pump connection



Jan. 18, 1949. M. NICKELSEN ET AL 2,459,716

TIRE PUMP CONNECTION Filed April4 29, 1946 INVENToR. JOHN M. N/C/(ELsE/v HFA/APY w. EMEe/cc ym@ f m] A roe/vf s Patented Jan. 18, 1949 aisarief TIBEPUMP coNNEc'rroN 'John/M'. Nckels'enuAnn Arbor, andHenry 'i Emerick, Monroe, 4Mich...assigner@ to;lionroev Autir Equipment. Company, 'Mon1'oe-, Michi, a corporation of Michigan a y This invention relatesgenerallyv to displace mentfpumps and refers lmore particularly to improvements in -pumpsof the type used to inflate pneumatic tires. p v

In the manufacture 'of tire pumps it is customary toinstall a-check valvein-t-he base of the pump and to connect the checkgzalue toa length of flexible conduitor 'hose' having. vaiitting on the free endii'or opening the tire'val'v'e. "This general type of construction complicates manufacture because it necessitates forming the' check valve and' tirevalve operating-fitting separately. Furthermore, diiculty ha'sabeen*A frequentl'y'encountered in assembling lthe .check valve on' the pump Ibase* due to rust-and. dirt whichnmay accumulate' on the par-ts prior to-assembly.

' One of the objectslofthis invention is'tofovercome theI above objectionsby incorporating*- the check-valvein atting attachable to thefiee-end of the hose and by combining the means for opening the tire valve with the fitting.

The foregoing as well as other objects will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawing, wherein:

Figure 1 is a semidiagrammatic view illustrating a tire pump assembly embodying the features of this invention;

Figure 2 is a sectional view through the fitting forming a part of the pump assembly; and

Figure 3 is a cross sectional View taken substantially on the plane indicated by the line 3 3 of Figure 2.

The pump forming the subject matter of this invention is adapted for use in connection with a conventional pneumatic tire comprising a casing I and an inner tube II. The inner tube Il is provided with the usual valve stem I2 eX- tending outwardly from the tube and housing a normally closed tire valve assembly I3. The outer end of the Valve stem I2 is externally threaded for threadably engaging a dust cap not shown herein.

A typical pump for inating the pneumatic tire is indicated in Figure 1 of the drawing by the reference character I 4. The pump I 4 comprises a Vertical cylinder in the form of a length of tubing l5 and a piston i6 slidably supported in the cylinder.

of the cylinder is closed by a cap I8. The piston I6 is reciprocated in the cylinder I5 by a rod I9 projecting downwardly through a central opening in the cap I8 and secured to the piston. A

The bottom of the cylinder is closed by a support engaging base plate I7 and the top llipplicationAApril- 29, 1946, Serial No.5 (c1. zei-is) suitable handle 29' is Ifixed to theuppen end. of:

the rod; to-facil-itateo'peration ofit-'h'e pistoni. K

Thexlower: end.A ofthecylinder I E'Ii'szrformect with'.

atubular projectionv 2:I andthebore throught-he projection communicates withtheinterioriof the;`

duit in the form-ofY hose 22.*isremovablysenurediA at` one endl to..theitubularfprojectionv 2dr for re:-y ceiving, the `air vdischarged front' the-.pump .cylinder I5. The fteerfendi oi t-heflexi'ble conduit22;

n removablysecured to. attingiZ- and'` the latter. is'

constructed to permit readily attachingthe; free,- endv'of thetube to the vali/ierstern:r If2 of th'efpneu` matictire.

; 1 The fitting 23 comprises .an elongated: body; memberfz, ai capf25- and a sealing gasket `26. The-.gbodyjl is axially.; bored to` provideanair` passagev therethroughgand isffomn'ed; with aman nular valve seat 25 adjacent the inner end of the passage for engagement with a ball check valve member 2'?. vThe purpose of the check valve 21 is to prevent the escape of air from the inner tube II to the pump cylinder I5 on the suction stroke of the piston i6. The free end of the flexible conduit 22 is adapted to telescope the body 24 of the litting and a plurality of axially spaced annular ridges 28 are formed on the outer surface of the body. to grip the adjacent portion of the iiexible conduit 22.

The cap 25 of the fitting 23 is internally threaded for threadably engaging the valve stem I2 and is formed with an annular ange 29 at the inner side thereof. The flange 29 is adapted to be crimped over the'head 3G formed on the outer end of the fitting body 24. The connection between the flange 29 and the head 30 is such as to enable rotation of the cap 25 relative to the body 24 and at the same time prevent disengagement of the cap 25 from the body.

The sealing gasket 26 forms a seal between the cap 25 and the body 2li toprevent the escape of air from the fixture when the latter is assembled on the valve stem I2. stance the gasket 2E is formed of ductile metal although various other materials having sealing characteristics may be employed. .Regardless of the material from which the'gasket 2B is formed means is provided o-n the gasket for engaging the tire valve I3-and for moving the latter to its open position. This means is shown in Figure 2 of the drawing as comprising a substantially U- 'shaped projection SI on the gasket 26. The leg In the present inof the latter and the base portion of the projection is positioned to engage the tire valve I3 upon threading the cap 25 on the valve stem I2. It follows from the above that the tire valve I3 is automatically opened in response to threading the cap 25 of the fitting onto the outer end of the valvestem I2. f n

Thus from the foregoing it will be noted that the check valve and 'associated parts are divorced from the pump proper and may be readily removed from the extremity of the hose or flexible Vconduit 22 for cleaning purposes. It will also be noted that the means for opening the tire valve Prior to inating the pneumatic tire forms a part of the fitting containing the check valve. Thus the check valve and the tire valve operating means form a self-contained unit which may be inexpensively manufactured and readily installed,

What we claim as our invention is:

1. A pump tting for use in connection with a pneumatic tire having a valve stem embodying a normally closed valve, said fitting including an elongated body adapted to be detachably conl neeted to an air pump by means of a suitable conduit and having an axially extending passageway therethrough, a check yvalve in said passageway 4for controlling the ilow of air therethrough, a cap elongated body adapted to be detachably connected to an air pump by means of a suitable conduit and having an axially extending passageway therethrough, said passageway being reduced in diameter intermediate the ends thereof so as to form an annular valve seat, a check valve in the-form of a ball disposed in saidpassageway for engagement with said` valve seat and adapted to be moved out of engagement with said valve seat by air pressure from the pump and moved intoengagement with said valve seat by air pressure from a tire, a cap internally threaded for threadably eng-.aging Lthe tire valve and secured 'to one end of said body for rotation relative thereto, an annular sealing gasket secured between said body end and said cap so as to seal the joint between said cap and body, and an integrally formed projection on said gasket pr0- jecting into said cap so as to engage and open the valve in the tire valve stem when the cap is threaded on the latter.

, JOHN M. NICKELSEN. HENRY W. EMERICK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PA'I'ENTS Hoge eb.` 6, 1940 

